In a poll of 1013 adults, it was found that 22% smoked cigarettes in the past...

Question

Question

In a poll of 1013 adults, it was found that 22% smoked cigarettes in the past week. Use a 0.05 significance level to test the

Answer 1

Answer #1

Coiven, n=1013 0 - 2 2 20 20 21 P=0.25 & Hypothesis: Ho: P = 0.25 Hei P<0.25 6 Test & ratistic z = Ô -P px ( p) = 0.22 0.25 T

Answer 2

Similar Homework Help Questions

7. The claim is that the proportion of adults who smoked a cigarette in the past...

7. The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.30, and the sample statistics include n=1181subjects with 331 saying that they smoked a cigarette in the past week. Find the value of the test statistic. The test statistics is____ (Round to two decimal places as needed.) 8. The claim is that the IQ scores of statistics professors are normally distributed, with a mean greater than greater than 127 A...
The claim is that the proportion of adults who smoked a cigarette in the past week...

The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.25, and the sample statistics include n=1774 subjects with 426 saying that they smoked a cigarette in the past week. Find the value of the test statistic.
A poll found that in a random sample of 1000 American adults, 720 indicated that they...

A poll found that in a random sample of 1000 American adults, 720 indicated that they oppose the reinstatement of a military draft. Is there convincing evidence that the proportion of American adults who oppose reinstatement of the draft is greater than 0.7? Use a significance level of 0.05. (Round your test statistic to two decimal places and your P-value to four decimal places.) A poll found that in a random sample of 1000 American adults, 720 indicated that they...

A poll found that 74% of a random sample of 1013 adults said that they believe...

A poll found that 74% of a random sample of 1013 adults said that they believe in ghosts. a. Determine the margin of error for a 99% confidence interval. (Round to three decimal places) E=
A poll of 2,142 randomly selected adults showed that 92% of them own cell phones. The...

A poll of 2,142 randomly selected adults showed that 92% of them own cell phones. The technology display below results from a test of the claim that 91% of adults own cell phones. Use the normal distribution as an approximation to the binomial distribution, and assume a 0.05 significance level to complete parts (a) through (e). Test of p=0.91 vs p≠0.91 Sample X N Sample p 95% CI Z-Value P-Value 1 1970 2,142 0.919701 (0.908193,0.931210) 1.57 0.117 a. Is the...
Previously, 5% of mothers smoked more than 21 cigarettes during their pregnancy. An obstetrician believes that...

Previously, 5% of mothers smoked more than 21 cigarettes during their pregnancy. An obstetrician believes that the percentage of mothers who smoke 21 cigarettes or more is less than 5% today. She randomly selects 120 pregnant mothers and finds that 3 of them smoked 21 or more cigarettes during pregnancy Test the researcher's statement at the a = 0.05 level of significance What are the null and alternative hypotheses? H: P = 0.05 versus H, P < 0.05 (Type integers...

When 3014 adults were surveyed in a poll, 79% said that they use the Internet. Is...

When 3014 adults were surveyed in a poll, 79% said that they use the Internet. Is it okay for a newspaper reporter to write that "3/4 of all adults use the Internet"? Why or why not? Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value method. Use the normal distribution as an approximation of the binomial distribution. Identify the null and alternative hypotheses. Choose...
I need help answering this question Confidence in banks: A news poll conducted in 2012 asked...

I need help answering this question Confidence in banks: A news poll conducted in 2012 asked a random sample of 1268 adults in the United States how much confidence they had in banks and other financial institutions. A total of 144 adults said that they had a great deal of confidence. An economist claims that less than 11% of U.S. adults have a great deal of confidence in banks. Can you conclude that the economist's claim is true? Use both...
A Harris poll taken randomly surveyed 2,016 adults and found that 423 of them had one...

A Harris poll taken randomly surveyed 2,016 adults and found that 423 of them had one or more tattoos. Test the claim that less than 25% of adults have one or more tattoos. Use a 5% level of significance. State the decision rule

I. In a KRC Research poll, 1002 adults were asked if they felt vulnerable to identity...

I. In a KRC Research poll, 1002 adults were asked if they felt vulnerable to identity theft, and 531 of them said "yes". Use a 0.05 significance level to test the claim that the majority of adults feel vulnerable to identity theft. Write the null and alternative hypotheses in symbolic form. a. b. Find the test statistic. c. Find the P-value. d. Make a decision about the null hypothesis. e. State the final conclusion, addressing the original claim, in nontechnical...